Dried Out Flower Blossoms. No Tomatoes.

[tibobyt]

I'm getting plenty of flower blossoms on a variety of heirlooms but they end up drying out most of the time so I have few, if any, tomatoes producing on the vines. I check the soil with a moisture guage to make sure I am not over or under watering. I water the soil only. I have been fertilizing and added bone meal at the recommendation of our local nursery. Any ideas?

[gixxerific]

Is it hot by you? That could be the problem. Flowers will drop when it
s too hot.

[tibobyt]

Except for a couple of 90+ degree weeks it's been pretty cool since I planted my tomatoes in April. I have only harvested a few tomatoes so far. The plants are getting big (6' high) but a few still don't even have any fruit on them; on others the fruit are still small and green. Overall though there is not much fruit appearing on the vines.